Free Practice Questions for Huawei H12-725_V4.0 Exam

Comprehensive and Detailed Explanation:

SSL VPN authorization is role-based:

Role-based policiesdetermine user permissions.

IP-based access controlensures users connect from allowed networks.

Why are B and C incorrect?

SSL VPN does not authenticate based on MAC address or port number.

HCIP-Security References:

Huawei HCIP-Security Guide → SSL VPN Access Control

Comprehensive and Detailed Explanation:

Inbound bandwidth= Trafficenteringthe firewall.

Outbound bandwidth= Trafficleavingthe firewall.

Correct answers:B. Public → Private traffic is controlled by inbound bandwidth.D. Private → Public traffic is controlled by outbound bandwidth.

HCIP-Security References:

Huawei HCIP-Security Guide → Firewall Virtual System Bandwidth Control

Comprehensive and Detailed Explanation:

IPsec VPN only supports IP unicast traffic.

Non-IP unicast packets (such as multicast and broadcast) are not natively supported.

To transmit multicast traffic over IPsec, GRE over IPsec is required.

Why is this statement true?

Standard IPsec VPN does not support non-IP unicast packets.

HCIP-Security References:

Huawei HCIP-Security Guide → IPsec VPN Limitations

Comprehensive and Detailed Explanation:

Aggressive modeis a faster IKE Phase 1 negotiation method butdoes not support NAT traversal (NAT-T) with AH.

NAT-T only works with ESP, because:

AH includes the original IP header in its integrity check, which breaks when NAT modifies the IP address.

ESP works with NAT-Tsince it does not include the original IP header in its integrity check.

Why is this statement false?

AH does not support NAT-T, soAH+ESP cannot be used in NAT traversal scenarios.

HCIP-Security References:

Huawei HCIP-Security Guide → IPsec VPN NAT Traversal

Comprehensive and Detailed Explanation:

Flood attacks (DoS/DDoS) overwhelm network resources, preventing normal users from accessing services.

Correct answers:

A. Exhaust available bandwidth→ Large amounts of traffic saturate the network.

B. Exhaust server-side resources→ High CPU/memory usage causes server crashes.

D. Exhaust network device resources→ Firewalls, routers, and switches become overloaded.

Why is C incorrect?

Controlling host rights is related to hacking, not flooding attacks.

HCIP-Security References:

Huawei HCIP-Security Guide → DoS/DDoS Attack Prevention

Comprehensive and Detailed Explanation:

ATIC (Advanced Threat Intelligence Center) systemconsists of:

SecoManager (Management Center)→ Manages security policies.

Detection devices→ Analyze traffic for threats.

Cleaning devices→ Mitigate attacks.

Why is B false?

ATIC architecture does not include a "collector and controller" structure.

HCIP-Security References:

Huawei HCIP-Security Guide → ATIC System Architecture

1️⃣Understanding the Scenario:

Enterprise A and Enterprise B communicate over the Internet through an IPsec tunnel.

Firewall A and Firewall B establish the tunnelto secure traffic between the enterprises.

The network includes aSource NAT device, meaning IP headers may be modified.

The goal is to ensure confidentiality, integrity, and authentication of data transmission.

2️⃣Why ESP (Encapsulating Security Payload)?

ESP (Encapsulating Security Payload)provides:

Encryption (Confidentiality)→ Protects data from eavesdropping.

Integrity & Authentication→ Ensures data is not modified.

NAT Traversal Support→ Works through NAT devices, unlike AH (Authentication Header).

ESP is the preferred choice for VPN tunnels over the public Internet.

3️⃣Why Tunnel Mode?

Tunnel Mode encapsulates the entire original IP packet, including headers and payload,adding a new IP header.

Advantages of Tunnel Mode:

Protects both the data and the original IP addresses(important for communication over untrusted networks).

Used in site-to-site VPNswhere private network addresses need to be hidden.

HCIP-Security References:

Huawei HCIP-Security Guide→ IPsec VPN Fundamentals

Huawei USG Series Firewall Configuration Guide→ IPsec ESP vs. AH

RFC 4301 (Security Architecture for the Internet Protocol)→ ESP and Tunnel Mode Usage

Comprehensive and Detailed Explanation:

Firewalls with advanced security features(such asIPS, Antivirus, and File Filtering) candetect and respond to file anomalies.

Actions that can be taken when an anomaly is detected:

A. Alarm→ Generates a log entry and notifies the administrator.

C. Block→ Prevents the file from being transferred.

D. Delete attachment→ Removes malicious attachments from emails.

Why is B incorrect?

Allowing a detected malicious file is not a valid security response.

HCIP-Security References:

Huawei HCIP-Security Guide → File Filtering & IPS Protection

Comprehensive and Detailed Explanation:

Huawei firewalls come with a built-in URL filtering database, which includes predefined categories such as:

Malicious websites

Phishing sites

Social media

Business services

The URL category database is periodically updated by Huawei, ensuring that new threats are detected automatically.

Why is this statement true?

Administrators do not need to manually load URL categories; they are delivered with the firewall and updated regularly.

HCIP-Security References:

Huawei HCIP-Security Guide → URL Filtering & Web Security